<script setup>
// computed 计算属性
// 导入
import { computed, ref } from 'vue'
const count = ref(1)
const add = () => {
  count.value++
}
const doubleCount = computed(() => {
  return count.value * 2
})
const list = ref([1, 2, 3, 4, 5, 6, 7, 8])
const filterList = computed(() => {
  return list.value.filter((item) => item > 5)
})
// computed: {
//   doubleCount () {
//     return count * 2
//   }
// }
</script>

<template>
  <div>
    <button @click="add">修改信息</button>
    <!-- 模版里使用不需要使用.value 模版引擎自动帮咱们做了 -->
    <p>{{ count }}</p>
    <p>{{ doubleCount }}</p>
    <p>{{ list }}</p>
    <p>{{ filterList }}</p>
  </div>
</template>

<style scoped>
header {
  line-height: 1.5;
  max-height: 100vh;
}

.logo {
  display: block;
  margin: 0 auto 2rem;
}

nav {
  width: 100%;
  font-size: 12px;
  text-align: center;
  margin-top: 2rem;
}

nav a.router-link-exact-active {
  color: var(--color-text);
}

nav a.router-link-exact-active:hover {
  background-color: transparent;
}

nav a {
  display: inline-block;
  padding: 0 1rem;
  border-left: 1px solid var(--color-border);
}

nav a:first-of-type {
  border: 0;
}

@media (min-width: 1024px) {
  header {
    display: flex;
    place-items: center;
    padding-right: calc(var(--section-gap) / 2);
  }

  .logo {
    margin: 0 2rem 0 0;
  }

  header .wrapper {
    display: flex;
    place-items: flex-start;
    flex-wrap: wrap;
  }

  nav {
    text-align: left;
    margin-left: -1rem;
    font-size: 1rem;

    padding: 1rem 0;
    margin-top: 1rem;
  }
}
</style>
